SoftBank shares surged — on five times the previous day’s volume — on Wednesday after the Japanese investment group landed a starring role in an U.S. artificial intelligence infrastructure buildout package backed by President Donald Trump.

President Donald Trump talked up a joint venture investing up to $500 billion for infrastructure tied to AI by a new partnership formed by OpenAI, Oracle and SoftBank.

The president said it will be the largest AI infrastructure ever built and that it will help counter technology threats from China and other countries.

President Donald Trump held a press conference to announce Stargate, a $500 billion artificial intelligence (AI) infrastructure project in the United States. He called it the "largest AI infrastructure project,

OpenAI has announced that it's teaming up with Softbank and Oracle on $100 billion data center project in the U.S.

SoftBank Group shares jumped after the company and ChatGPT-maker OpenAI announced plans to invest up to half a trillion dollars in artificial-intelligence infrastructure in the U.S. Shares rose 8.8% to 10,060 yen, or equivalent to $64.69, on Wednesday in Tokyo, after climbing as much as 9.2% earlier, to their highest level since July.

OpenAI CEO Sam Altman, SoftBank CEO Masayoshi Son and Chairman of Oracle appeared is set to appear at the White House Tuesday afternoon alongside President Donald Trump and other tech CEOs to announce a massive private sector investment in artificial intelligence infrastructure in the United States.

Shares in Japanese tech behemoth SoftBank Group soared more than eight percent on Wednesday after US President Donald Trump announced a major investment to build AI infrastructure.

Trump was joined by Oracle founder Larry Ellison, OpenAI CEO Sam Altman, and SoftBank CEO Masayoshi Son, who said the investment would start with $100 billion, plus a goal of $500 billion over the course of four years.

SoftBank CEO Masayoshi Son's plan to invest billions in AI in the United States shows one way to handle the new Trump administration: go big and deal with the details later.

Donald Trump has announced the "Stargate Project." Backed by major tech companies, the project aims to boost AI infrastructure in the U.S.